<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        #box{
            width: 800px;
            height: 600px;
            position: relative;
            margin: 100px auto;
            background: #000000;
            border: 2px solid red;
            overflow: hidden;
        }
        .ball{
            width: 10px;
            height: 10px;
            border-radius: 50%;
            position: absolute;
            bottom: 0px;
        }
    </style>
</head>
<body>
    <div id="box"></div>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
    
    <script type="text/javascript">

        function FireWork(){
            this.container = document.querySelector("#box");
            this.bindEvent();
        }
        FireWork.prototype.bindEvent = function(){
            var self = this
            self.container.onclick = function(evt){
                var e = evt || event;
                var fireWork = self.createFireWork();
                fireWork.style.left = e.offsetX + "px";
                $(fireWork).animate({
                    top : e.offsetY + "px"
                },800, function(){
                    fireWork.remove();
                })
            }
        }
        FireWork.prototype.createFireWork = function(){
            var self = this
            var div = document.createElement("div");
            div.className = "ball";
            div.style.backgroundColor = "#" + Math.round(parseInt("ffffff", 16) * Math.random()).toString(16).padStart( 6 , "0");
            this.container.appendChild(div);
            return div;
        }
        FireWork.prototype.boom = function(){}
        var fw = new FireWork();
    </script>
</body>
</html>